I have red that the IKEA Signal Repeater does work better with some of the Xiaomi devices, than the IKEA Outlets. But not sure why.
Let me see if I find the link to the post where I red this...
EDIT: It sais:
Zigbee repeaters reported to work with Xiaomi devices
- @iharyadi's Homemade Temperature, Humidity, Pressure, and Light Sensor
- IKEA
- TRÃ…DFRI LED Bulbs (based on 1 user report)
- TRÃ…DFRI Signal repeater (confirmed by multiple users)
- TRÃ…DFRI Wireless control outlet (fully confirmed to work)
From this post: